Updated:May, 2026

10 Best Hvac Gauges Built In Micron Gauge of 2026

Best Choice

9.9

Outstanding

CPS

CPS VG200 Digital Vacrometer Vacuum Gauge, Measures Microns, Millibar, TORR, Inches/HG, Two Button Operation, Automatic Temperature Compensation, 5-digit LCD Display, Padded Case, T-Fitting and Hook

Why We Love It

SUPERIOR ACCURACY: Calibrated to strict NIST standards to ensure optimal precision and reliability during evacuation procedures, making it the preferred choice for professionals who demand accuracy.
FLEXIBLE UNIT SELECTION: Easily switch between microns, millibar, torr, and inches/hg with just two buttons, allowing for versatile application and adaptability to different measurement requirements
AUTOMATIC TEMPERATURE COMPENSATION: No manual adjustments are needed as the digital vacuum gauge automatically compensates for varying temperature conditions, delivering consistent readings in any environment
DURABLE AND USER-FRIENDLY: Features a cleanable sensor that withstands up to 400 PSI positive pressure, along with a large, easy to read 5-digit LCD display for enhanced usability and durability
COMPLETE KIT: Includes a gauge hook, adapter T-fitting, and padded vinyl case, providing all the essentials to keep your digital vacuum gauge protected and accessible for any application

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Why We Love It

SUPERIOR ACCURACY: Calibrated to strict NIST standards to ensure optimal precision and reliability during evacuation procedures, making it the preferred choice for professionals who demand accuracy.
FLEXIBLE UNIT SELECTION: Easily switch between microns, millibar, torr, and inches/hg with just two buttons, allowing for versatile application and adaptability to different measurement requirements
AUTOMATIC TEMPERATURE COMPENSATION: No manual adjustments are needed as the digital vacuum gauge automatically compensates for varying temperature conditions, delivering consistent readings in any environment
DURABLE AND USER-FRIENDLY: Features a cleanable sensor that withstands up to 400 PSI positive pressure, along with a large, easy to read 5-digit LCD display for enhanced usability and durability
COMPLETE KIT: Includes a gauge hook, adapter T-fitting, and padded vinyl case, providing all the essentials to keep your digital vacuum gauge protected and accessible for any application

How We Find the Top Picks

We use smart data tools to review thousands of products and stores, analyzing ratings, reviews, and popularity trends to highlight what truly matters to shoppers like you.

Our experts then refine the results, blending AI insights with real user experiences to deliver accurate, up-to-date rankings that help you choose with confidence.

9.5

Excellent

Rogvoc

ROGVOC Digital Vacuum Gauge, Micron Vacuum Gauge Tester with 11 Units, 7/16 inch-20 UNF, HVAC 0-75000 Microns Rang, Including 1/4" SAE Fitting and T-Connector, Battery Not Included

Main Highlights

HVAC DIGITAL VACUUM GAUGE: Digital vacuum gauge can measure real-time pressure during refrigeration system evacuation and vacuuming. Ideal for dynamically monitoring vacuum changes in HVAC and heat pump systems. Used with a vacuum pump to assess dehumidification, impurity removal, and overall system integrity quickly and accurately
PARAMETERS: Maximum overload pressure of vacuum gauge: 2bar, Accuracy: ±(10% reading + 10 m)(100-1,000 m), Resolution:1 um to 5000 um, Operating temperature: 14-122 ; Connection:1/4 SAE(7/16" - 20 UNF) external thread. Digital HVAC vacuum gauge uses pirani vacuum sensor, which can respond quickly and accurately measure micro-pressure changes in vacuum
MONITORING MODE AND BUZZER PROMPTER: Built-in visual alerts and buzzer activate instantly when the preset target vacuum level is reached. This crucial feature helps technicians prevent over-evacuation and avoids wasted time, ensuring optimal efficiency during system servicing
WIDE UNIT SUPPORT & BACKLIT DISPLAY: Features 11 selectable vacuum units: microns, mTorr, umHg, Torr, mmHg, Pa, hPa, kPa, mbar, psia, inHg. Vacuum gauge tester with a large backlit display for clear readings in all environments, including dark spaces
PACKING INCLUDES: digital vacuum gauge x 1, portable tool bag x 1, 1/4" SAE Fitting x 1 , T - Connector x 1 and user manual. We provide 7 x 24 hours customer support. (Powered by 3 x AA batteries, not included.)

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Main Highlights

HVAC DIGITAL VACUUM GAUGE: Digital vacuum gauge can measure real-time pressure during refrigeration system evacuation and vacuuming. Ideal for dynamically monitoring vacuum changes in HVAC and heat pump systems. Used with a vacuum pump to assess dehumidification, impurity removal, and overall system integrity quickly and accurately
PARAMETERS: Maximum overload pressure of vacuum gauge: 2bar, Accuracy: ±(10% reading + 10 m)(100-1,000 m), Resolution:1 um to 5000 um, Operating temperature: 14-122 ; Connection:1/4 SAE(7/16" - 20 UNF) external thread. Digital HVAC vacuum gauge uses pirani vacuum sensor, which can respond quickly and accurately measure micro-pressure changes in vacuum
MONITORING MODE AND BUZZER PROMPTER: Built-in visual alerts and buzzer activate instantly when the preset target vacuum level is reached. This crucial feature helps technicians prevent over-evacuation and avoids wasted time, ensuring optimal efficiency during system servicing
WIDE UNIT SUPPORT & BACKLIT DISPLAY: Features 11 selectable vacuum units: microns, mTorr, umHg, Torr, mmHg, Pa, hPa, kPa, mbar, psia, inHg. Vacuum gauge tester with a large backlit display for clear readings in all environments, including dark spaces
PACKING INCLUDES: digital vacuum gauge x 1, portable tool bag x 1, 1/4" SAE Fitting x 1 , T - Connector x 1 and user manual. We provide 7 x 24 hours customer support. (Powered by 3 x AA batteries, not included.)

9.5

Excellent

Elitech

Elitech VGW-Mini Wireless Digital Vacuum Gauge with Adaptor Rechargeable Pressure Tester Meter HVAC 0-19000 Micron, Alarms via APP, Offline Recording, Temp Compensation, 1/4" SAE

Main Highlights

UPGRADED ELITECH TOOLS APP(ioS and Android): An intergraded app, that allows users to manage all Elitech tools such as vacuum pump, digital manifold, vacuum gauge, pressure gauge, refrigerant charging scale on one app, more efficient and more intelligent.
MULTIFUNCTIONAL DESIGN: Settable target, notifications will be sent when readings exceed the predetermined value. The data can be recorded and exported in Excel and PDF format.
INTELLIGENT JUDGEMENT OF H2O STATUS: The vacuum meter automatically judges physical state of H2O by comparing ambinent temperature and water saturation temperature corresponding to the vacuum in the system.
LARGE DISPLAY: Continual digital readout of evacuation process can be viewed easily on the large, full-view LCD screen.
WIDE MEASUREMENT RANGE & HIGH ACCURACY: Used to test system leak and discern vacuum pump quality of the evacuation in an HVAC and refrigeration system; accurate measurements from 19,000 Microns (atmosphere) to 0 Micron. Accuracy: ±10% or ±10 Micron
NOTICE: There is an oil proof film inside the head of the product, which may cause a delayed numerical display when directly connected to the vacuum pump. We suggest to remove the oil film when connecting the vacuum pump and reinstall it when connecting the system.

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Main Highlights

UPGRADED ELITECH TOOLS APP(ioS and Android): An intergraded app, that allows users to manage all Elitech tools such as vacuum pump, digital manifold, vacuum gauge, pressure gauge, refrigerant charging scale on one app, more efficient and more intelligent.
MULTIFUNCTIONAL DESIGN: Settable target, notifications will be sent when readings exceed the predetermined value. The data can be recorded and exported in Excel and PDF format.
INTELLIGENT JUDGEMENT OF H2O STATUS: The vacuum meter automatically judges physical state of H2O by comparing ambinent temperature and water saturation temperature corresponding to the vacuum in the system.
LARGE DISPLAY: Continual digital readout of evacuation process can be viewed easily on the large, full-view LCD screen.
WIDE MEASUREMENT RANGE & HIGH ACCURACY: Used to test system leak and discern vacuum pump quality of the evacuation in an HVAC and refrigeration system; accurate measurements from 19,000 Microns (atmosphere) to 0 Micron. Accuracy: ±10% or ±10 Micron
NOTICE: There is an oil proof film inside the head of the product, which may cause a delayed numerical display when directly connected to the vacuum pump. We suggest to remove the oil film when connecting the vacuum pump and reinstall it when connecting the system.

9.2

Excellent

Fieldpiece

Fieldpiece SM382V Wireless 3-Port SMAN Refrigerant Manifold with Vacuum Gauge – Digital Gauges for HVAC & Refrigeration

Main Highlights

Advanced digital refrigerant manifold & micron gauge for HVAC & Refrigeration diagnostics & service
Fieldpiece digital manifold gauges accurately measure low & high pressure, with superheat and subcooling
Digital refrigerant manifold with protected thermocouple jacks for pipe and outdoor temps
Four valve manifold with vacuum gauge has the ability for Job Link Psychrometer probes to connect to SMAN
Equipped with data logging and temperature compensated system tightness test capability

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Main Highlights

Advanced digital refrigerant manifold & micron gauge for HVAC & Refrigeration diagnostics & service
Fieldpiece digital manifold gauges accurately measure low & high pressure, with superheat and subcooling
Digital refrigerant manifold with protected thermocouple jacks for pipe and outdoor temps
Four valve manifold with vacuum gauge has the ability for Job Link Psychrometer probes to connect to SMAN
Equipped with data logging and temperature compensated system tightness test capability

9.0

Excellent

Super Stars

Super Stars Digital Micron Vacuum Gauge, 1/4 inch SAE, HVAC Pressure Tester with Alarm, Temp Compensation, LCD Backlit Display, 4 Units, Carrying Case Included

Main Highlights

High Accuracy Vacuum Measurement: Equipped with a professional Pirani vacuum sensor, the ST-VG90 offers fast and accurate readings with a wide range from 99999 to 0.1 Pa (740000 to 0.75 micron), ensuring your HVAC system is moisture-free before refrigerant charging
4 Pressure Units Available: Easily switch between Pa, mBar, mmHg, and Micron to meet international and industry-specific standards. Designed for both technicians and advanced users who need flexibility in the field
Smart Vacuum Alarm Function: Built-in buzzer and visual alert activate once the preset vacuum level is reached, helping prevent over-evacuation or wasted time during system evacuation
Backlit LCD & Power-saving Design: Clear digital LCD screen with optional backlight ensures readability even in low-light environments. Automatic power-off function preserves battery life
Durable and Pump Compatibility: Compact pocket sized design with one key calibration and quick unit switching works with vacuum pumps of 5 CFM or higher for stable and accurate performance

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Main Highlights

High Accuracy Vacuum Measurement: Equipped with a professional Pirani vacuum sensor, the ST-VG90 offers fast and accurate readings with a wide range from 99999 to 0.1 Pa (740000 to 0.75 micron), ensuring your HVAC system is moisture-free before refrigerant charging
4 Pressure Units Available: Easily switch between Pa, mBar, mmHg, and Micron to meet international and industry-specific standards. Designed for both technicians and advanced users who need flexibility in the field
Smart Vacuum Alarm Function: Built-in buzzer and visual alert activate once the preset vacuum level is reached, helping prevent over-evacuation or wasted time during system evacuation
Backlit LCD & Power-saving Design: Clear digital LCD screen with optional backlight ensures readability even in low-light environments. Automatic power-off function preserves battery life
Durable and Pump Compatibility: Compact pocket sized design with one key calibration and quick unit switching works with vacuum pumps of 5 CFM or higher for stable and accurate performance

8.8

Very Good

Wisscool

WISSCOOL Digital Vacuum Gauge, HVAC Vacuum Micron Gauge Tester, 1/4" Flare, 0-30000 Microns Range, ±5% Accuracy, 7/16-20UNF Interface with 1/4" SAE Connector and T-Connector, 4 Vacuum Units Switch

Main Highlights

Pirani Sensor Vacuum gauge: The blue digital vacuum gauge built with Pirani professional vacuum sensor can precisely measure the vacuum level.From the measurement, it can therefore gather information about humidity and the removal of foreign matter (oil, foreign gases, etc.), and thus know the best status to fill refrigerants. The vacuum meter can be used for monitoring vacuum system, leaking detection and distinguish the pump in quality
Large LCD digital display and Alarm: WISSCOOL micron vacuum gauge hvac allows users to set a vacuum pressure alert value; when the measured pressure approaches this value, the screen flashes, and when the measured pressure reaches or exceeds the set point, the gauge triggers an audible alarm. Our digital vacuum gauge features a 3-inch LCD screen for crystal-clear viewing, equipped with an adjustable backlight for viewing even in dark areas
High Precision Vacuum Tester: The digital vacuum tester features a high-precision sensor, easily achieving lab-grade standards.The vacuum ranges from 0-10000 Pa,0-100.00 mBar,0-75.000 mmHg,0-75000 Micron. Vacuum resolution are 0.01(<10 Pa), 0.0001(<10 mBar), 0.0001(<10 mmHg), 1(<30000 Microns). Accuracy is 2-100 Pa,±5% of reading(at 20).The speed refresh rate is 0.5 second. Operating Temperature: 32-122
Four Vacuum Test Units: WISSCOOL micron vacuum gauge supports 4 vacuum units including Pa, mBar, mmhg, Microns.The micron gauge hvac in evacuation mode provides vacuum level. Application for atmospheric environment (it can not be measured in the presence of refrigerants and other gas environment)
Package Includes: The package comes with a blue vacuum gauge, 3xAA batteries, one 1/4" SAE extension connector fitting, one T-connector, a instruction manual and a portable tool bag
Usage Note: The vacuum gauge works with Stage two/5cfm vacuum pump machine or more. Please check instruction and operation videos before usage

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Main Highlights

Pirani Sensor Vacuum gauge: The blue digital vacuum gauge built with Pirani professional vacuum sensor can precisely measure the vacuum level.From the measurement, it can therefore gather information about humidity and the removal of foreign matter (oil, foreign gases, etc.), and thus know the best status to fill refrigerants. The vacuum meter can be used for monitoring vacuum system, leaking detection and distinguish the pump in quality
Large LCD digital display and Alarm: WISSCOOL micron vacuum gauge hvac allows users to set a vacuum pressure alert value; when the measured pressure approaches this value, the screen flashes, and when the measured pressure reaches or exceeds the set point, the gauge triggers an audible alarm. Our digital vacuum gauge features a 3-inch LCD screen for crystal-clear viewing, equipped with an adjustable backlight for viewing even in dark areas
High Precision Vacuum Tester: The digital vacuum tester features a high-precision sensor, easily achieving lab-grade standards.The vacuum ranges from 0-10000 Pa,0-100.00 mBar,0-75.000 mmHg,0-75000 Micron. Vacuum resolution are 0.01(<10 Pa), 0.0001(<10 mBar), 0.0001(<10 mmHg), 1(<30000 Microns). Accuracy is 2-100 Pa,±5% of reading(at 20).The speed refresh rate is 0.5 second. Operating Temperature: 32-122
Four Vacuum Test Units: WISSCOOL micron vacuum gauge supports 4 vacuum units including Pa, mBar, mmhg, Microns.The micron gauge hvac in evacuation mode provides vacuum level. Application for atmospheric environment (it can not be measured in the presence of refrigerants and other gas environment)
Package Includes: The package comes with a blue vacuum gauge, 3xAA batteries, one 1/4" SAE extension connector fitting, one T-connector, a instruction manual and a portable tool bag
Usage Note: The vacuum gauge works with Stage two/5cfm vacuum pump machine or more. Please check instruction and operation videos before usage

8.6

Very Good

Rogvoc

ROGVOC Digital Vacuum Gauge, HVAC Micron Vacuum Gauge Tester with 4 Units 7/16 inch-20 UNF, Digital Vacuum Micron Meter Set with Buzzer Alarm, 1/4 inch SAE Extension Connector Fitting

Main Highlights

HVAC DIGITAL VACUUM GAUGE: Digital vacuum gauge can measure the real-time pressure during vacuuming of the refrigeration system, suitable for dynamic monitoring of vacuum pressure changes in HVAC and heat pump systems. It can be used in conjunction with a vacuum pump to measure the real-time pressure during vacuuming, quickly and accurately judge the degree of dehumidification and impurity removal, and detection the vacuum system and refrigeration systemin real time
PARAMETERS: Maximum overload pressure of vacuum gauge: 72 psi/0.5 Mpa; Accuracy: 0.1-1000 Pa (digital plus or minus 5%); Resolution: 0.01(10 Pa); Operating temperature: -23-122 ; Connection:7/16 inch-20 UNF(1/4 inch SAE). Digital HVAC vacuum gauge uses pirani vacuum sensor, which can respond quickly and accurately measure micro-pressure changes in vacuum
MONITORING MODE AND BUZZER PROMPTER: The micron vacuum gauge defaults to the normal mode after it is turned on. Press "SET" button to active target vacuum set montioring mode. After target vacuum is set, press 'SAVE CAL to save and active monito mode, buzzer beeps periodic. When vacuum pressure reached set pressure,alert will be activated (screeflicker,buzzer beeps), press any key to quit alert or wait 35 seconds,alewill stop automatically
SUPPORTS 4 UNITS AND DISPLAY BACKLIT: Rogvoc digital vacuum gauge supports 4 type pressure units: Pa, mBar, mmHg, Microns. Vacuum gauge tester with a large backlit display for clear readings even in dark environments. The anti-slip rubber on both sides of the vacuum gauge and the easy-to-carry tool bag provide great convenience for work
CUSTOMER SUPPORT: We provide 7 x 24 hours customer support. If you have any questions about the product, please feel free to contact us, we will reply within 24 hours and help you. Packing includes: digital vacuum gauge x 1, portable tool bag x 1, AA batteries x 3, extension connector x 1 and user manual

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Main Highlights

HVAC DIGITAL VACUUM GAUGE: Digital vacuum gauge can measure the real-time pressure during vacuuming of the refrigeration system, suitable for dynamic monitoring of vacuum pressure changes in HVAC and heat pump systems. It can be used in conjunction with a vacuum pump to measure the real-time pressure during vacuuming, quickly and accurately judge the degree of dehumidification and impurity removal, and detection the vacuum system and refrigeration systemin real time
PARAMETERS: Maximum overload pressure of vacuum gauge: 72 psi/0.5 Mpa; Accuracy: 0.1-1000 Pa (digital plus or minus 5%); Resolution: 0.01(10 Pa); Operating temperature: -23-122 ; Connection:7/16 inch-20 UNF(1/4 inch SAE). Digital HVAC vacuum gauge uses pirani vacuum sensor, which can respond quickly and accurately measure micro-pressure changes in vacuum
MONITORING MODE AND BUZZER PROMPTER: The micron vacuum gauge defaults to the normal mode after it is turned on. Press "SET" button to active target vacuum set montioring mode. After target vacuum is set, press 'SAVE CAL to save and active monito mode, buzzer beeps periodic. When vacuum pressure reached set pressure,alert will be activated (screeflicker,buzzer beeps), press any key to quit alert or wait 35 seconds,alewill stop automatically
SUPPORTS 4 UNITS AND DISPLAY BACKLIT: Rogvoc digital vacuum gauge supports 4 type pressure units: Pa, mBar, mmHg, Microns. Vacuum gauge tester with a large backlit display for clear readings even in dark environments. The anti-slip rubber on both sides of the vacuum gauge and the easy-to-carry tool bag provide great convenience for work
CUSTOMER SUPPORT: We provide 7 x 24 hours customer support. If you have any questions about the product, please feel free to contact us, we will reply within 24 hours and help you. Packing includes: digital vacuum gauge x 1, portable tool bag x 1, AA batteries x 3, extension connector x 1 and user manual

8.3

Very Good

Supco

Supco VG64 Vacuum Gauge, Digital Display, 0-12000 microns Range, 10% Accuracy, 1/4" Male Flare Fitting Connection , Grey

Main Highlights

Vacuum gauge with ultra-fine resolution (0.5 to 1000 micron), and a 0-12,000 micron vacuum range for accurate pressure measurement during system evacuation, and high-precision laboratory tests
Programmable, audible and visual alarm for high and low vacuum indicates when threshold is reached
Backlit, LCD digital display of seven international units including microns, Pascal, and PSI, and a 1/2-second response time
Auto shut-off eight hours after alarm activation, and when alarm is disabled
Built-in hanging apparatus for maneuverability

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Main Highlights

Vacuum gauge with ultra-fine resolution (0.5 to 1000 micron), and a 0-12,000 micron vacuum range for accurate pressure measurement during system evacuation, and high-precision laboratory tests
Programmable, audible and visual alarm for high and low vacuum indicates when threshold is reached
Backlit, LCD digital display of seven international units including microns, Pascal, and PSI, and a 1/2-second response time
Auto shut-off eight hours after alarm activation, and when alarm is disabled
Built-in hanging apparatus for maneuverability

8.1

Very Good

starEEl

Pro Digital Vacuum Gauge, HVAC Pressure Tester with Alarm， HVAC Micron Gauge 0-75,000 Microns, 7/16-20 UNF, 1/4 inch SAE, Temp Compensation, LCD Backlit Display

Main Highlights

High Precision for HVAC ExcellenceEquipped with a professional Pirani vacuum sensor, digital vacuum gauge delivers rapid, accurate readings across an extensive range (0-75,000 microns ), with ±5% accuracy. Perfect for micro-leak detection and vacuum quality assessment in HVAC systems
Durability and VersatilityDesigned specifically for HVAC environments: 14 PSI overpressure protection, 1/4" SAE tapered connector (7/16-20 UNF), fully compatible with industry tools, and reliable performance across a temperature range of 32-122°F. Switchable between 4 units (Pa, mBar, mmHg, microns)
Pro-grade calibration and AlertsEnsures accuracy through professional dual calibration (full-scale and zero-point calibration). Features a large backlit LCD screen with a refresh rate of 0.5 seconds, enabling real-time monitoring in low-light environments. Triggers immediate audio and visual alerts when the set value is reached.
Smart Temp Compensation Built-in algorithm to automatically correct for temperature changes, adjusting readings in real time to counteract heat-related sensor drift. This ensures reliable, consistent vacuum measurements even when ambient temperatures fluctuatecritical for precise HVAC system checks.
Packing ListDigital vacuum gauge*1, Bend sensor connector*1, Tee connector*1, Storage bag*1, Instruction manual*1 and Battery *3

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Main Highlights

High Precision for HVAC ExcellenceEquipped with a professional Pirani vacuum sensor, digital vacuum gauge delivers rapid, accurate readings across an extensive range (0-75,000 microns ), with ±5% accuracy. Perfect for micro-leak detection and vacuum quality assessment in HVAC systems
Durability and VersatilityDesigned specifically for HVAC environments: 14 PSI overpressure protection, 1/4" SAE tapered connector (7/16-20 UNF), fully compatible with industry tools, and reliable performance across a temperature range of 32-122°F. Switchable between 4 units (Pa, mBar, mmHg, microns)
Pro-grade calibration and AlertsEnsures accuracy through professional dual calibration (full-scale and zero-point calibration). Features a large backlit LCD screen with a refresh rate of 0.5 seconds, enabling real-time monitoring in low-light environments. Triggers immediate audio and visual alerts when the set value is reached.
Smart Temp Compensation Built-in algorithm to automatically correct for temperature changes, adjusting readings in real time to counteract heat-related sensor drift. This ensures reliable, consistent vacuum measurements even when ambient temperatures fluctuatecritical for precise HVAC system checks.
Packing ListDigital vacuum gauge*1, Bend sensor connector*1, Tee connector*1, Storage bag*1, Instruction manual*1 and Battery *3

8.1

Very Good

Testo

testo 552i Wireless Digital Vacuum Probe - Vacuum Gauge for HVAC Systems with IP54 Protection – 45° Service-Port Design - HVAC Tool for AC/R System Evacuation with Bluetooth and App

Main Highlights

Accurate: The testo 552i vacuum gauge delivers deep-vacuum measurements down to single-digit resolution with an accuracy of ±10 micron + 10% of mv (100-1000 micron). This gives you confidence that evacuation targets are reliably reached and verified
Easy-to-use: The micron gauge features an integrated 45° angle for quick, stress-free installation at any service port, while the robust IP54 housing ensures dependable operation even in demanding HVAC environments
Clever: For wireless vacuum measurement, the testo 552i vacuum gauge automatically connects to digital manifolds and operates via a single service port. Saving time, reducing setup complexity, and preventing refrigerant loss
Efficient: The hvac tool enables fast vacuum assessment and displays live measurement data directly on the digital manifold and in the testo Smart App, so you can make informed decisions without interrupting your workflow
Smart App: Use the Smart App to clearly document results on your smartphone or tablet, control service and maintenance tasks remotely, and send reports directly from the job site - saving time on documentation and follow-up

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Main Highlights

Accurate: The testo 552i vacuum gauge delivers deep-vacuum measurements down to single-digit resolution with an accuracy of ±10 micron + 10% of mv (100-1000 micron). This gives you confidence that evacuation targets are reliably reached and verified
Easy-to-use: The micron gauge features an integrated 45° angle for quick, stress-free installation at any service port, while the robust IP54 housing ensures dependable operation even in demanding HVAC environments
Clever: For wireless vacuum measurement, the testo 552i vacuum gauge automatically connects to digital manifolds and operates via a single service port. Saving time, reducing setup complexity, and preventing refrigerant loss
Efficient: The hvac tool enables fast vacuum assessment and displays live measurement data directly on the digital manifold and in the testo Smart App, so you can make informed decisions without interrupting your workflow
Smart App: Use the Smart App to clearly document results on your smartphone or tablet, control service and maintenance tasks remotely, and send reports directly from the job site - saving time on documentation and follow-up

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